Question

The following sample was taken from a normally distributed population:

3, 4, 5, 5, 6, 6, 6, 7, 7, 9, 10, 11, 12, 12, 13, 13, 13, 14, 15

(a) Compute the 0.95 confidence interval on the population mean

(b) Compute the 0.90 confidence interval on the population standard deviation

Answer #1

The following sample observations were randomly selected.
x:
5
3
6
3
4
4
6
8
y:
13
15
7
12
13
11
9
5
Determine the 0.95 confidence interval for the mean predicted
when x = 7. (Round your answers to 4 decimal
places.)
Determine the 0.95 prediction interval for an individual
predicted when x = 7. (Round your answers to 4
decimal places.)

A random sample of size 15 is taken from a normally distributed
population revealed a sample mean of 75 and a standard deviation of
5. The upper limit of a 95% confidence interval for the population
mean would equal?

A random sample is taken from the normally distributed data
.Find the 95% confidence interval for the population mean ? .
The sample values are : 3 5 2 4 6 3 7 8 3 9

Suppose a random sample of size 11 was taken from a normally
distributed population, and the sample standard deviation was
calculated to be s = 6.5. We'll assume the sample mean is 10 for
convenience. a) Calculate the margin of error for a 90% confidence
interval for the population mean. Round your response to at least 3
decimal places. Number b) Calculate the margin of error for a 95%
confidence interval for the population mean. Round your response to
at...

A random sample of size 14 was taken from a normally distributed
population with a population mean 25 and a population standard
deviation 6.
Determine each of the following about the sampling distribution
of the sample mean.
Round your answer to at least 3 decimal places where
appropriate.
a) μx_=
b) σx_=
c) Can we conclude that the sampling distribution of
the sample mean is normal? Yes or No

1. In a sample of 64 Pasadena residents the mean age was 57.8
years. From the census it's known that the age has a standard
deviation of 6.5 years. Find a 90% confidence interval for the
population mean age. (Note: CL=0.90)
2.
The following table list the number of white mathematicians
mentioned in a sample of 30 textbooks.
4
6
6
7
9
9
10
10
11
13
13
14
15
17
17
18
18
19
19
21
21
22...

Assume the sample is taken from a normally distributed
population and construct the indicated confidence
interval.
Construct the indicated confidence intervals for the population
variance σ 2 and the population
standard deviation σ. Assume the sample is from a normally
distributed population
c = 0.99, s = 228.1 , n
= 61

The following sample data is taken from the normal population:
10, 8, 12, 15, 13, 11, 6, 5.
a. What is the estimator of the average population
b. What is the estimator of the population standard deviation
c. At the 95% confidence level, what is the error margin of the
population mean estimator
d. Determine 95% confidence intervals for the population mean

The following sample data is taken from the normal population:
10, 8, 12, 15, 13, 11, 6, 5.
a. What is the estimator of the average population
b. What is the estimator of the population standard deviation
c. At the 95% confidence level, what is the error margin of the
population mean estimator
d. Determine 95% confidence intervals for the population mean

The following sample data is taken from the normal population:
10, 8, 12, 15, 13, 11, 6, 5.
a. What is the estimator of the average population
b. What is the estimator of the population standard deviation
c. At the 95% confidence level, what is the error margin of the
population mean estimator
d. Determine 95% confidence intervals for the population mean

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